千年木垂叶怎么回事？麒麟黄叶怎么回事？/What's with the thousand-year-old tree leaves?

今日提问：千年木、蝴蝶兰、文殊兰、麒麟、琴叶榕/Today's question: Millennium Wood, Phalaenopsis, Manchuria, Kirin, Banyan